Fantasy Tip: Foster has been dealing with injuries once again this season and had clearly lost his starting job to Jay Ajayi. The 30-year-old's body just didn't have enough gas left in the tank to be sustainable for another full NFL season. Ajayi is a must-own player at this point after rushing for 200-plus yards in back-to-back games. Damien Williams is a viable handcuff, particularly in PPR leagues. Foster is obviously safe drop in all formats.

Fantasy Tip: Foster will not be in the starting lineup but should receive some touches during the game. Foster could be a flex option in deeper leagues but probably can be avoided in most standard leagues.

Fantasy Tip: Foster should be available to play in Week 7 but may be behind Jay Ajayi in terms of snaps during the game. He should still have a decent role in the offense and can be a flex option in fantasy leagues.

Fantasy Tip: It will be interesting to see how Adam Gase utilizes all of his running backs. Jay Ajayi deserves more work after last week's performance. Foster's main role could be in the passing game. He's a flex at best in Miami's current backfield situation.

Fantasy Tip: Foster should be active for the team's Week 7 game but his role is uncertain since Jay Ajayi had a terrific game last week. Foster should see some touches during the game, but owners likely will have better options available.

Miami Dolphins RB Arian Foster (hamstring) is still not at 100 percent, according to head coach Adam Gase. Gase did say that Foster "still brings something to the table," however.

Fantasy Tip: If there was a feast at the table in Week 6 then Foster must have brought the salad dressing. Jay Ajayi brought the entrees, the sides and the dessert. We could see more of an even split once Foster is fully ready, but Ajayi should continue to see most of the work after his Week 6 breakout. Ajayi is another top waiver wire pickup this week, especially for those who want to handcuff Foster.

Fantasy Tip: Foster did very little, and his role is likely to remains rather limited with Jay Ajayi going off in the victory. Foster is worth adding in fantasy leagues if he is available off the waiver wire, but keep him reserved until his role expands.

Fantasy Tip: Foster is seeing his first action since Week 2 and should be considered a risky flex option at best versus the Steelers, especially since it is uncertain how many snaps he will receive. He is averaging just 2.9 yards per carry and doesn't have a rushing attempt longer than nine yards this year.

Fantasy Tip: Foster was listed as questionable on the injury report but was a full participant in practice Friday, Oct. 14. However, he hasn't played since Week 2 and wasn't very productive prior to getting hurt, making him a risky flex option versus Pittsburgh.

Miami Dolphins RB Arian Foster (hamstring) will have his availability for the team's Week 6 game against the Pittsburgh Steelers determined by how he feels after participating in pregame warmups, according to ESPN's Adam Schefter.

Fantasy Tip: Foster hasn't played since Week 2, and even if he's active it's hard to project how much of the load they'll ask him to carry. He's a risky flex option at best.

Fantasy Tip: Foster has been practicing on a limited basis throughout the week, so it appeared he was closer to making his return after missing the prior three games. Even if he does manage to suit up, he's a shaky option, given that he'd likely be playing at less than 100 percent, plus the Dolphins' offense has been messy in the early going. If has to sit once again, Jay Ajayi would be the biggest beneficiary, though he can be a mixed bag as a RB3.

Fantasy Tip: Even with the limited practices, it would be mildly surprising if Foster doesn't return this weekend. His status will need to be monitored heading into the weekend, but he's in RB3 territory against the Pittsburgh Steelers if he does play.

Fantasy Tip: Foster should remain stashed in seasonal leagues since he will serve as Miami's primary running back once he is healthy enough to return. RBs Jay Ajayi, Kenyan Drake and Damien Williams will split carries this week, with Ajayi likely to see the bulk of the action, but none of these players makes a great fantasy option.

Fantasy Tip: It would probably be the prudent move given Foster's injury history. The Dolphins have had next to no running game since Foster got hurt early in Week 2, but all the blame doesn't necessarily fall on his replacements. Still, it is obvious head coach Adam Gase trusts Foster more than he does any other back on the roster. He'll be a midrange flex option when he does return.

Miami Dolphins RB Arian Foster (hamstring) was limited in practice Thursday, Oct. 6. The Dolphins did not practice; Foster's status is an estimation of how active he would have been if Miami did practice.

Fantasy Tip: It's unclear if Foster will be able to take the field. If he's sidelined again then the Dolphins would once again implement a committee of Jay Ajayi, Kenyan Drake and Damien Williams. None of them are worth writing home about, but Ajayi would be the better bet if Foster is out. That being said, Ajayi is a flex play at best, but he's been too inconsistent to expect much from.

Fantasy Tip: Foster is such a talented football player, but his propensity for injury is a major headache for fantasy owners. Avoid him if you have other alternatives and wait to see him prove his health in a game or two before relying upon him again.

Fantasy Tip: Foster could be a game-time decision for Week 5, so owners should continue to monitor the situation. Foster is a solid No. 2 running back when he is healthy, but owners will need other options ready in case Foster is ruled out.

Fantasy Tip: The Dolphins are likely to trim down the running back committee in order to allow one or two of the backs to gain a rhythm. Jay Ajayi is likely to be in the lead, and Kenyan Drake in some form behind him. Both are worth owning, but neither are more than flex options against the Tennessee Titans.

Fantasy Tip: Foster has not practiced since suffering his injury in Week 2, so even if he is able to get in a couple of limited sessions later this week, it is unlikely he'll be of much use this weekend versus the Tennessee Titans. Jay Ajayi appeared to make a move to take over lead-back duties in Foster's absence last week and head coach Adam Gase has publicly stated he would like to let one runner get into a rhythm, but there's just not enough upside in this backfield to put up with the headaches it will cause in most weeks.

Miami Dolphins RB Arian Foster (hamstring) did not participate in practice Wednesday, Sept. 28, and has been ruled out for Week 4.

Fantasy Tip: Jay Ajayi and Kenyan Drake will continue to share work at running back with Foster sidelined. None of the running back posted great numbers in the team's Week 3 game and they likely will not receive enough carries to have a big impact. Ajayi may be a flex option in deeper leagues, but most owners should be able to find better options.

Fantasy Tip: Foster is doubtful in a short week for the Dolphins. Jay Ajayi, Kenyan Drake and Damien Williams will comprise a committee backfield, but that backfield is too much of a crapshoot right now to seriously consider starting anyone. If push comes to shove, Ajayi is the better bet.

Fantasy Tip: The signs are pointing to Foster missing at least another week, especially since the Dolphins play on Thursday in Week 4. Jay Ajayi, Kenyan Drake and Damien Williams will comprise a committee backfield, but that backfield is too much of a crapshoot right now to seriously consider starting anyone. If hard pressed, though, Ajayi is the better bet.

Fantasy Tip: Jay Ajayi had just seven rushes for 28 yards, but a touchdown saved his performance in Week 3. However, he lost a fumble in the game as well. He's a flex option against the Cincinnati Bengals this week.

Fantasy Tip: Given Foster's injury history, this was the expected outcome. The 30-year-old should be considered week-to-week at this point, although it's not as if he was getting much done on the ground anyway (16 carries for 47 yards). Head coach Adam Gase said Friday he doesn't know which running back will start in Foster's place, meaning not even Jay Ajayi can be considered a flex option in what should be a plus-matchup.

Miami Dolphins RB Arian Foster (groin) did not participate in practice Thursday, Sept. 22. Head coach Adam Gase said the team is trying to figure out the severity of Foster's injury.

Fantasy Tip: Foster probably will not play in Week 3 and could miss more time depending on the injury. Jay Ajayi and Kenyan Drake will share snaps if Foster misses the game with Ajayi likely to receive most of the carries. Ajayi could be a low-end No. 2 running back or a flex option in most leagues, while Drake may not be a great fantasy option.

Miami Dolphins RB Arian Foster (groin) is not participating in practice Wednesday, Sept. 21, and appears to be a long shot to play in Week 3. He may have a chance to play in Week 4.

Fantasy Tip: Owners should monitor the situation during the week to see if Foster has any chance to play this week. Jay Ajayi and Kenyan Drake would receive more playing time if Foster is inactive with Ajayi likely to receive a majority of the work. Ajayi should be considered a low-end No. 2 running back or a flex option.

The Miami Dolphins are "cautiously optimistic" regarding RB Arian Foster (groin). He has not yet been ruled out for Week 3. His status may not be better determined until later in the week, however.

Fantasy Tip: If Foster can't take the field against the Cleveland Browns on Sunday then Jay Ajayi and Kenyan Drake would be the primary beneficiaries in his stead. If Foster is out, Ajayi wouldn't be a bad start as a low-end RB2 or high-end RB3 against a lowly Cleveland defense.

Miami Dolphins RB Arian Foster (groin) is dealing with a groin strain and his status for Week 3 is in question. He is not expected to miss more than one to two games.

Fantasy Tip: Don't be surprised if Foster sits this weekend. If he does, Jay Ajayi then takes the start in Miami's backfield, with Kenyan Drake also in the mix. Ajayi could achieve RB2 numbers in a favorable matchup against the Cleveland Browns, but it might be safer to start him as a flex.

Miami Dolphins RB Arian Foster (groin) is considered day-to-day with a groin injury, according to head coach Adam Gase. Gase said he is unsure if Foster will practice Wednesday, Sept. 21.

Fantasy Tip: Jay Ajayi and Kenyan Drake would take over Miami's backfield if Foster is unable to play this weekend. Close attention should be paid to Foster's practice participation throughout the week. Ajayi would be a decent flex start against a bad Cleveland Browns defense if Foster is ruled out.

Miami Dolphins RB Arian Foster (groin) will have an MRI on his injured groin Monday, Sept. 19, but the team is concerned he'll miss at least Week 3.

Fantasy Tip: Jay Ajayi and Kenyan Drake figure to see the most action in Foster's absence. Ajayi is probably owned in most leagues, but Drake had a seven-yard score in Week 2, which lends confidence for a pickup.

Updating a previous report, Miami Dolphins RB Arian Foster (groin) left the Week 2 game against the New England Patriots due to a groin injury, and beat writer Adam Beasley believes the injury might be more than a one-week issue. RB Jay Ajayi filled in, running five times for 14 yards while adding four receptions for 31 yards.

Fantasy Tip: If Foster is forced to miss time it would be Ajayi and rookie Kenyan Drake filling in. Ajayi would be the better fantasy option of the two.

Fantasy Tip: Foster has dealt with injuries during his career, so owners will need to monitor the situation. Jay Ajayi may be the next in line for the starting job if Foster is dealing with a serious injury and could be a flex option for owners.

Fantasy Tip: Foster should receive his normal workload even though he missed a day of practice this week. He recorded 100 yards in total offense in Week 1 and should be involved in the passing game again this week. Foster can be a No. 2 running back in a majority of leagues.

Fantasy Tip: Foster participated fully in practice Thursday, Sept. 15, and Friday, Sept. 16, and he is expected to receive the bulk of the work at running back this week. He should be viewed as a viable RB2 or flex option in all fantasy formats.

Fantasy Tip: Foster should be able to play this week and likely will receive most of the work at the running back position. He was able to record 100 total yards last week and should be a decent No. 2 running back in most leagues. He will have more value in point-per-reception leagues since he will be involved in the passing game.

Fantasy Tip: Foster likely will receive most of the work at running back his week and will also be involved in the passing game. He will be facing a tough New England Patriots defense but should be considered a No. 2 running back or a flex option in most fantasy leagues.

Fantasy Tip: Foster missed practice Wednesday, Sept. 14, but appears to be on track to play in Week 2 as long as he does not suffer a setback. He had a solid performance in Week 1 and should be considered a No. 2 running back or flex option in most fantasy leagues.

Fantasy Tip: Owners will need to monitor Foster's status during the week to see if he will be able to play in Week 2. He posted 100 yards of total offense in the first game of the season and can be a No. 2 running back or flex option if he is active for the game.

Fantasy Tip: Foster was the top dog with Damien Williams only occasionally spelling him while Jay Ajayi was back in Miami. As long as he can stay healthy and carry the load almost exclusively, he is a solid RB2 in most fantasy formats.

Fantasy Tip: Not a big surprise. Foster is healthy and impressed in the preseason. Jay Ajayi should still see a decent workload this season, and he could definitely take over as starter if Foster gets injured. For those last-minute drafters, Foster is a low-end RB2 to high-end RB3 consideration, while Ajayi is more of a low-end RB3 to high-end RB4 option with Foster healthy.

Fantasy Tip: Foster has looked pretty good so far this preseason, including in the club's most recent contest on Thursday when he rushed for a touchdown and also logged two catches for 20 yards. It's hard to guess which of the two tailbacks will yield the most fantasy points this year, but Foster could be the safer option based on his proven track record. As a result, he's worth going after in the middle rounds, though owners also have to realize he's still injury-prone.